Class: ActiveRecord::Base

Inherits:

Object

• Object
• ActiveRecord::Base

Defined in:

app/models/active_record/base.rb

Class Method Summary

• .tristate_column_names ⇒ Array<Symbol>

  Names of Boolean columns which can store ‘NULL` values.

Class Method Details

.tristate_column_names ⇒ Array<Symbol>

Returns names of Boolean columns which can store ‘NULL` values.

Examples:

Company.tristate_column_names
#=> [:is_profitable, :is_run_by_psychopaths, :evades_taxation, ...]

Returns:

• (Array<Symbol>) —

  names of Boolean columns which can store ‘NULL` values

# File 'app/models/active_record/base.rb', line 10

def self.tristate_column_names
  columns.select { |col| col.type == :boolean && col.null }.map(&:name)
end